1. Welcome to Tundras.com!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tundra discussion topics
    • Transfer over your build thread from a different forum to this one
    • Communicate privately with other Tundra owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

ECM Connector Diagram

Discussion in '2nd Gen Tundras (2007-2013)' started by fcwakko, Aug 9, 2020.

  1. Aug 9, 2020 at 11:00 AM
    #1
    fcwakko

    fcwakko [OP] New Member

    Joined:
    Aug 9, 2020
    Member:
    #50559
    Messages:
    2
    Gender:
    Male
    Vehicle:
    2007 Tundra TRD
    Hello All. New member here. I could use help finding the pinout for the ECM connector on an 07 Tundra SR5 TRD. Anyone know where I could look? To be more precise I'm looking for the pins for SL2 pressure solenoid.
    Background: Code P0778 Pressure Solenoid B open or grounded. Limp mode.
    - After some searching I figured out that is SL2 Solenoid.
    - In manual shifting, I can see rpm drop when shifting all the way to 4th but not beyond.
    - If I'm up to speed and clear codes then I could shift to 5th and 6th and see the rpm drops.
    - As soon as I slow down where truck would shift to 4th or if I manually shift to 4th, code comes back.
    - Codes come up as soon as key is turned on and reappear immediately if cleared.
    - Decided to take opportunity to flush trans (254K miles), change filter while I changed solenoid.
    - old solenoid reads same 5.8Ohm like new one, so nothing wrong I guess but changed it anyway.
    - Found a Toyota Service page on checking solenoid B, disconnected ECM connector, have 3.6Ohm between pins 12-13.
    - Unplugged transmission connector 3MOhm between pins 3-11, which is not right, showing short to ground on pin 3.
    -The weird part is with both ends of wire disconnected I don't show any short from the ECM side of the wire (pins 12, 13) only from trans side. I'm guessing I have the wrong diagram for the ECM connector and pin 12 and 13 are not for solenoid SL2.Screenshot_20200809-111624_Chrome.jpg Screenshot_20200809-111547_Drive.jpg
     
  2. Aug 14, 2020 at 1:48 PM
    #2
    fcwakko

    fcwakko [OP] New Member

    Joined:
    Aug 9, 2020
    Member:
    #50559
    Messages:
    2
    Gender:
    Male
    Vehicle:
    2007 Tundra TRD
    Update on this. I still have the issue but I did eventually recognize I was looking at the wrong connector on the trans. The SL2 sensor connector was the next one over and just had 2 wires on it.
    The wires on that plug did ring up to the ECM connector and were not shorted.
     

Products Discussed in

To Top